command: Remove the cmd_tbl_t typedef

We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/bootmenu.c b/cmd/bootmenu.c
index 6af0617..2e3f56e 100644
--- a/cmd/bootmenu.c
+++ b/cmd/bootmenu.c
@@ -482,7 +482,7 @@
 }
 #endif
 
-int do_bootmenu(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+int do_bootmenu(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	char *delay_str = NULL;
 	int delay = 10;